Alharbi Khalid Saad, Afzal Obaid, Altamimi Abdulmalik Saleh Alfawaz, Almalki Waleed Hassan, Kazmi Imran, Al-Abbasi Fahad A, Alzarea Sami I, Makeen Hafiz A, Albratty Mohammed
Department of Pharmacology, College of Pharmacy, Jouf University, Sakaka, Saudi Arabia.
Department of Pharmaceutical Chemistry, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al Kharj, Saudi Arabia.
J Food Biochem. 2022 Dec;46(12):e14471. doi: 10.1111/jfbc.14471. Epub 2022 Oct 21.
Aging is a significant risk factor for the majority of prevalent human illnesses. The chance of having severe chronic conditions grows dramatically with advancing age. Indeed, more than 90% of people over 65 get at least one chronic disease, including diabetes, heart disease, malignancy, memory loss, and kidney disease, whereas more than 70% have two or more of these ailments. Mouse and human aging lead to increased senescent cells and decreased klotho concentrations. Mice lacking the protein α-klotho show faster aging, similar to human aging. α-Klotho upregulation extends life and slows or suppresses the onset of many age-related illnesses and kidney diseases. Like the consequences of α-klotho deficiency, senescent cell accumulation is linked to tissue dysfunction in various organs and multiple age-related kidney diseases. In addition, α-klotho and cell senescence are negatively and presumably mechanistically linked. Earlier research has demonstrated that klotho exerts its protective effects in age-related and kidney disease by interacting with Wnt ligands, serving as an endogenous antagonist of Wnt/β-catenin signaling. In addition, decreasing senescent cell burden with senolytics, a class of drugs that remove senescent cells selectively and extend the life span of mice. In this work, we are studying the molecular mechanism of the combination of quercetin and dasatinib as senolytic in easing age-related chronic renal illness by altering the level of klotho/Wnt/β-catenin. PRACTICAL APPLICATIONS: There is an inverse relationship between the onset and the development of age-related disorders and cellular senescence and Klotho. Earlier attempts to suppress transforming growth factor-beta 1 (TGF-β1) in kidney disease with anti-TGF-β1 antibodies were ineffective, and this should be kept in mind. Senolytic medications may benefit from targeting senescent cells, which enhances the protective factor α-klotho. In addition, our study provides a unique, translationally feasible route for creating orally active small compounds to enhance α-klotho, which may also be a valuable biomarker for age-related kidney disease. Additionally, other aspects of aging can be affected by senolytics, such as limiting age-related mitochondrial dysfunction, lowering inflammation and fibrosis, blunting reactive oxygen species (ROS) generation, decreasing deoxyribonucleic acid (DNA) damage, and reinforcing insulin sensitivity. Senolytic agents have been shown to increase adipose progenitor and cardiac progenitor cell activity in aging animals and animals with cellular senescence-related diseases, such as heart, brain, and kidney disease.
衰老是大多数常见人类疾病的重要风险因素。随着年龄的增长,患严重慢性病的几率会急剧上升。事实上,超过90%的65岁以上人群至少患有一种慢性病,包括糖尿病、心脏病、恶性肿瘤、记忆力减退和肾病,而超过70%的人患有两种或更多种此类疾病。小鼠和人类的衰老会导致衰老细胞增多和klotho浓度降低。缺乏蛋白质α-klotho的小鼠衰老更快,类似于人类衰老。α-klotho的上调可延长寿命,并减缓或抑制许多与年龄相关疾病和肾病的发生。与α-klotho缺乏的后果一样,衰老细胞的积累与各个器官的组织功能障碍以及多种与年龄相关的肾病有关。此外,α-klotho与细胞衰老呈负相关,且可能存在机制上的联系。早期研究表明,klotho通过与Wnt配体相互作用,作为Wnt/β-连环蛋白信号的内源性拮抗剂,在与年龄相关的疾病和肾病中发挥其保护作用。此外,使用衰老细胞溶解剂可减轻衰老细胞负担,衰老细胞溶解剂是一类能选择性清除衰老细胞并延长小鼠寿命的药物。在这项工作中,我们正在研究槲皮素和达沙替尼联合作为衰老细胞溶解剂,通过改变klotho/Wnt/β-连环蛋白水平来缓解与年龄相关的慢性肾病的分子机制。实际应用:与年龄相关的疾病的发生和发展与细胞衰老和Klotho之间存在负相关关系。早期用抗转化生长因子-β1(TGF-β1)抗体抑制肾病中转化生长因子-β1(TGF-β1)的尝试无效,这一点应予以牢记。靶向衰老细胞的衰老细胞溶解药物可能有益,这会增强保护因子α-klotho。此外,我们的研究为开发口服活性小化合物以增强α-klotho提供了一条独特的、具有转化可行性的途径,α-klotho也可能是与年龄相关肾病的一个有价值的生物标志物。此外,衰老细胞溶解剂还可能影响衰老的其他方面,如限制与年龄相关的线粒体功能障碍、降低炎症和纤维化、减弱活性氧(ROS)生成、减少脱氧核糖核酸(DNA)损伤以及增强胰岛素敏感性。在衰老动物和患有细胞衰老相关疾病(如心脏、大脑和肾病)的动物中,衰老细胞溶解剂已被证明能增加脂肪祖细胞和心脏祖细胞的活性。